Hottest topic in physics revealed. Carbon nanotubes are the hottest topic in physics, according to a new way of ranking the popularity of different scientific fields. Nanowires are second, followed by quantum dots, fullerenes, giant magnetoresistance, M-theory and quantum computation. The new ranking has been developed by Michael Banks, a PhD student at the Max Planck Institute for Solid-State Physics in Stuttgart, Germany.
He thinks the new index could be a quick and simple way of determining the most important subject areas in physics and could even help graduate students choose which field to do their PhD in (physics/0604216). The new index is based on the "Hirsch index", which was devised last year by Jorge Hirsch of the University of California at San Diego as a way of quantifying the performance of individual scientists. Hirsch's h-index is derived from the number of times that papers by a particular scientist are cited. In the list of hot topics, carbon nanotubes are top with an m of 12.85. Univers d'atomes.
Des grains de pollen au microscope électronique. DIY Scanning Electron Microscope - Hacked Gadgets - DIY Tech Blog. There are lots of electronic projects that can be made at home but I would have never thought I would see a Scanning Electron Microscope that was made at home! The results are able to be watched on an oscilloscope. The comments of the article are great also and worth a read. You can see the system in operation in the video at 9:53. Via: Make “The lock washer is only being magnified 10 or 20x. In this test video, I wasn’t too concerned with focus, so the resolution is probably 50um or more. Eventually, I hope to achieve resolution of about 1um. I originally wanted to use a microprocessor to generate the raster scan pattern and capture the data for storage/display on an LCD. 20 Most Amazing Microscope Shots Pictures !!!!
These microscope pictures are taken from the book ‘ Microcosmos’, created by Brandon Brill . This book includes many scanning electron microscope (SEM) images of insects, human body parts and household items. These are the most amazing images of what is too small to see with the naked eye. 01 – A wood or heathland Ant, Formica fusca, holding a microchip 02 – The surface of an Erasable Programmable Read-Only Memory silicon microchip 03 – Eyelash hairs growing from the surface of human skin 04 – The surface of a strawberry 05 – Bacteria on the surface of a human tongue 06 – Human sperm (spermatozoa), the male sex cells 07 – The nylon hooks and loops of velcro 08 – Household dust which includes long hairs such as cat fur, twisted synthetic and woolen fibers, serrated insect scales, a pollen grain, plant and insect remains 09 -The weave of a nylon stocking 10 – The end of the tongue (proboscis) of a hummingbird hawkmoth 11 – The head of a mosquito 12 – A human head louse clinging to a hair.
100 Amazing Videos for Teaching and Studying Physics | Online Colleges. While physics can be a fascinating subject, some of the concepts it presents aren’t always the easiest for students to understand or for teachers to convey to their classes. That’s where the web can come to the rescue. Here you’ll find a list of some great videos that both clearly demonstrate the major ideas of physics for beginners, as well as provide insights in more complex topics for those who are more familiar with the subject matter, like students at online colleges for engineering. Check through the list to see if there’s something that can facilitate your teaching or learning process. Physics Fun These videos will help show the lighter side of physics with amazing experiments, funny raps and explanations of concepts in terms students can understand. Physics Basics Learn the essentials of understanding physics through these instructional videos for students at all levels.
Experiments and Demonstrations Perfect for the Classroom Television Programs Documentaries. Le microscope électronique à balayage (MEB) - une vidéo High-tech et Science. Carbone 42 - Microscopie électronique à balayage - une vidéo High-tech et Science. Effet tunnel. Un article de Wikipédia, l'encyclopédie libre. L'effet tunnel désigne la propriété que possède un objet quantique de franchir une barrière de potentiel même si son énergie est inférieure à l'énergie minimale requise pour franchir cette barrière. C'est un effet purement quantique, qui ne peut pas s'expliquer par la mécanique classique. Pour une telle particule, la fonction d'onde, dont le carré du module représente la densité de probabilité de présence, ne s'annule pas au niveau de la barrière, mais s'atténue à l'intérieur de la barrière, pratiquement exponentiellement pour une barrière assez large.
Si, à la sortie de la barrière de potentiel, la particule possède une probabilité de présence non nulle, elle peut traverser cette barrière. Cette probabilité dépend des états accessibles de part et d'autre de la barrière ainsi que de l'extension spatiale de la barrière. Animation montrant l'effet tunnel quantique et son utilisation dans un microscope à effet tunnel à gauche, à droite). Pour avec. Dossier sagascience - Nanotechnologies et santé. L'effet tunnel désigne la propriété que possède un objet quantique de franchir une barrière de potentiel, franchissement impossible selon la mécanique classique. Généralement, la fonction d'onde d'une particule, dont le carré du module représente l'amplitude de sa probabilité de présence, ne s'annule pas au niveau de la barrière, mais s'atténue à l'intérieur de la barrière, pratiquement exponentiellement pour une barrière assez large.
Si, à la sortie de la barrière de potentiel, la particule possède une probabilité de présence non nulle, elle peut traverser cette barrière. Cette probabilité dépend des états accessibles de part et d'autre de la barrière ainsi que de son extension spatiale. source : Wikipédia © CNRS/sagascience - Eric Vanneste. The strange new world of Nanoscience, narrated by Stephen Fry.